artifact – n. a simple object, such as a tool or weapon, that was made by people in the past​

concentration camps – n. a type of prison where large numbers of people who are not soldiers are kept during a war and are usually forced to live in very bad conditions​

climate-controlled – adj. another term for air conditioning​

diary – n. a book in which you write down your personal experiences and thoughts each day​

holocaust – n. the killing of millions of Jews and other people by the Nazis during World War II​

institution – n. an established organization​

preserve – v. to keep something in its original state or in good condition​